Ok, I have a 2002 LR Disco II with 180K miles. About 2 weeks ago it blew all kinds of codes listed below. The check engine came on and the M and S started flashing. Turn off and turned back on the M and S lights go off and it drives ok. At below 2k RPMs the M and S lights begin to flash and I have to pull over and turn off and restart to reset. On the highway or above 2K Rpm's it drives fine. Any assistance nailing down the issue or issues would be much appreciated!!
Thanks!~Cameron
Here are the codes:

P1884 - Looks like it could mean a few different things
P0734 - Gear Ratio Monitoring 4th gear
P1590 - Rough road signal implausible Drive cycle A:Signal implausible
P0335 - Reference mark detector fault (Reluctor wheel) Drive cycle A:Signal implausible
P0161 - Oxy Sensor Heater Downstream Cat bank 2 Drive cycle C:Signal out of range - below minimum
P0171 - Additive adaptive mixture correction TRA bank 1 Drive cycle B:Signal out of range - above maximum
P0130 - Lambda sensor upstream catalyst bank 1 Drive cycle C:Signal implausible
P0134 - Lambda sensor upstream catalyst bank 1 Drive cycle C:Signal missing
P0141 - Oxy Sensor Heater Downstream Cat bank 1 Drive cycle C:Signal out of range - above maximum